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1.

What three pieces of information does the transport layer use to manage the communication of separate data streams between hosts? (Choose three.)
	port numbers
	checksum values
	authentication keys
	sequence numbers
	encryption algorithms
	acknowledgment numbers

2.

TCP is referred to as connection-oriented. What does this mean? TCP uses only LAN connections. TCP requires devices to be directly connected. TCP negotiates a session for data transfer between hosts. TCP reassembles the data steams in the order that it is received.

3.

FTP provides a reliable, connection-oriented service for transferring of files. Which transport layer protocol is used for data transfer when this service is being used?
	TFTP
	TCP
	DNS
	IP
	UDP

4.

If an application uses a protocol that exchanges data without using windowing or flow control and must rely on higher layer protocols for reliability, which protocol and transfer methods are being used?
	UDP, connection-oriented
	UDP, connectionless
	TCP, connection-oriented
	TCP, connectionless

5.

Which Application layer protocol is widely used to support resolving host names to IP addresses?
	FTP
	SMTP
	SNMP
	DNS
	HTTP
	WWW

6.

What does the http portion of the URL http://www.cisco.com/edu/ communicate to a web browser?
	The web browser needs to locate the www server.
	The address is located on a site whose name is http.
	The web browser is notified as to which protocol to use.
	The http portion represents the type of web browser that needs to be used.

7.

What is the purpose of TCP/UDP port numbers?
	indicate the beginning of a three-way handshake
	reassemble the segments into the correct order
	identify the number of data packets that may be sent without acknowledgment
	track different conversations crossing the network at the same time

8.

What are the features of the User Datagram Protocol (UDP). (Choose three.)
	no guaranteed delivery of datagrams
	connection-oriented
	provides reliable full-duplex data transmission
	reliability provided by the application layer
	connectionless
	utilizes sliding windowing techniques

9.

Which protocol is used by e-mail servers to communicate with each other?
	FTP
	HTTP
	TFTP
	SMTP
	POP
	SNMP

10.

Which application layer protocol allows network devices to exchange management information?
	SMTP
	SNMP
	FTP
	TFTP
	EIGRP

11.

Which protocol is used to transfer files from computer to computer but is considered connectionless?
	FTP
	TFTP
	SNMP
	TCP
	DHCP

12.

Which layer of the OSI model can provide a connection-oriented, reliable data transfer between two hosts?
	Application
	Presentation
	Session
	Transport

13.

Which of the following are primary duties of the OSI transport layer? (Choose two.)
	path determination
	end-to-end connectivity
	flow control
	security control
	data representation
	encryption of data

14.

When the receiving workstation detects an error in the data it has received, it does not acknowledge receipt of the data. The source workstation retransmits the unacknowledged data. Which layer of the OSI model supports this process of retransmission?
	network
	application
	session
	transport

15.

Which port numbers are commonly assigned for FTP use? (Choose two.)
	19
	20
	21
	22